Where is the crank position sensor on a 91 dodge ram van 250 3.9 v6

SOURCE: 1997 Dodge caravan crank position sensor

it is located on the bellhousing of the transmission it gets its signal from the flywheel.look where the transmission bolts to the engine.

SOURCE: hoe to Replace an alternator on a 1996 Dodge Ram Van 2500 3.9L V6

Remove negative battery cable.
Remove the electrical plug and wireing. Mark them.
Loosen the alternator pivot bolt.
Remove the bolt that attaches the alternator to the adjustment arm.
Rotate the alternator to loosen the drive belt and disengage the belt from the pulley. Be careful that any spacers that are used in mounting are kept with their original bolts. This will make correct reinstallation much easier.
While supporting the alternator remove the pivot bolt.
Remove the alternator from the vehicle.
Do the reverse procedure to install new alternator.

SOURCE: how to test crank sensor 95 ram van 3.9

sometimes you can test the sensor with a multimeter(volt meter that measure OHMS), it should have some reading, if it is open(no reading) it is bad. Some autozone locations can test this sensor

SOURCE: crank position sensor location

should be on bell housing on thr driver side

SOURCE: need fuse box diagram for 91 dodge ram 150 van

i have the diagram for dodge ram van 250. don't know if it's the same, but i have it. find me at [email protected]